Can I preserve herbs in olive oil for cooking?

Choosing the Right Herbs and Oil

When preserving herbs in olive oil, select fresh, high-quality herbs with the right moisture content. For example, basil and rosemary are ideal because they have a relatively low moisture content compared to herbs like parsley or cilantro. For olive oil, use a high-quality, extra-virgin oil with a pH level below 4.6, which inhibits bacterial growth.

Preparing and Infusing Herbs

To prepare herbs for preservation in olive oil, wash and dry them thoroughly. Remove excess moisture with a clean kitchen towel or salad spinner. Next, chop or bruise the herbs to release their natural oils. Use a ratio of 1 part herbs to 3 parts olive oil. For example, combine 1 cup of fresh herbs (such as basil leaves) with 3 cups of olive oil. Transfer the mixture to a clean, sterilized glass jar and seal it tightly.

Storage and Shelf Life

Store the herb-infused olive oil in a cool, dark place, such as a pantry or cupboard. Keep the jar away from direct sunlight and heat sources. The shelf life of the preserved herbs in olive oil depends on several factors, including the quality of the herbs and oil, storage conditions, and handling. In general, the mixture will last for 1-2 years. To ensure the mixture remains fresh, check it regularly for signs of spoilage, such as mold, sediment, or off-odors.